I used advent 20g mini skeins from the dye shack to make mine. But I know it works just as well with stylecraft dk. Which is why I used that as the yarn used.
The pattern is a one size fits most. I do mention in the pattern where you can increase or decrease to fit your body. Also the stitch is really stretchy

Gauge is taken unblocked. Over 4inches using a 4mm hook.